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Insufficient vacuum to operate your power brakes? Install an electric vacuum pump.

Engines running big cams or equipped with superchargers may have insufficient vacuum to reliably actuate power brake boosters and other vacuum-dependent accessories. Whenever idle vacuum drops under 14 inches, some type of auxiliary vacuum augmentation will probably be needed. The simplest solution is an auxiliary vacuum canister, but in extreme cases it may be necessary to add an auxiliary electric vacuum pump. These pumps are available from many leading aftermarket brake specialists and—if you’re scouring the wrecking yards—are also are widely used in many OE econobox apps starting back in the ’80s.